"I don't fight," the "Complicated" singer tweeted. "I don't believe in it. To clear things up I got attacked by 5 people last night out of nowhere. Not cool. My face is f-----." Elaborating, Lavigne continued: "As in black eye, bloody nose, hair ripped out, scratches, bruises and cuts. So not ok to be abusive to others. Violence is NEVER the answer."

Jenner -- stepbrother of the elder Kardashian siblings and half-brother to Kardash-lings Kendall and Kylie (we consulted our homemade Kardashian-Jenner family tree on this one) -- reportedlygot hurt when he attempted to intervene in the brawl. Following the alleged incident, he took to Twittter, posting: "Interesting Saturday night ... Just got of the hospital with a new scar on my face.. Charges/chargers!!!"

(TMZ has a photo of Lavigne after the attack. Her injuries are not visible, perhaps because of all that hair.)